code: def get_default_reducer(self):
      return MeanReducer()
  
file_path: pytorch-metric-learning/src/pytorch_metric_learning/utils/module_with_records_and_reducer.py
imports: import copy
  from ..distances import LpDistance
  from ..reducers import DoNothingReducer, MeanReducer, MultipleReducers
  from .module_with_records import ModuleWithRecords
label_desc: Use image node_id 2 for calling the ModuleWithRecordsAndReducer obj's underlying member method code with example usage: obj.get_default_reducer() and returns: MeanReducer